Phase 6a: rename core vocabulary (game/main/component/archetype/system)

game/module -> program, main -> entry, component -> property,
archetype -> model, system -> handler. Done via a transitional self-hosting
bootstrap: parser accepts both -> reseed -> compiler source moved to new
keywords + parser tightened to new-only -> reseed (fixpoint holds). Old keywords
now rejected.

Token-safe corpus migration (tools/ludic-tools/rename_kw.c) leaves the LLVM
@main/entry: labels in emit strings untouched; goldens byte-identical. Editor
vocab (header/JetBrains/TextMate/emacs), check-docs wrapper, and doc fences
updated; error string 'unknown component' -> 'unknown property'. test.sh 14/14,
test-tools 28/0, check-vocabulary green. (Doc prose pass to follow.)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

tools/editors/jetbrains/src/main/kotlin/io/ludic/ide/LudicTokens.kt

@@ -41,8 +41,8 @@ object LudicTokens {
  */
 object LudicVocabulary {
     val DECL = setOf(
-        "game", "module", "import", "component", "struct", "archetype", "enum", "ui",
-        "const", "var", "fn", "extern", "system", "main"
+        "program", "import", "property", "struct", "model", "enum", "ui",
+        "const", "var", "fn", "extern", "handler", "entry"
     )
     val CLAUSE = setOf(
         "phase", "query", "reads", "writes"